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136 lines
3.9 KiB
136 lines
3.9 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _ASM_POWERPC_BOOK3S_64_HUGETLB_H |
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#define _ASM_POWERPC_BOOK3S_64_HUGETLB_H |
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/* |
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* For radix we want generic code to handle hugetlb. But then if we want |
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* both hash and radix to be enabled together we need to workaround the |
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* limitations. |
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*/ |
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void radix__flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr); |
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void radix__local_flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr); |
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extern unsigned long |
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radix__hugetlb_get_unmapped_area(struct file *file, unsigned long addr, |
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unsigned long len, unsigned long pgoff, |
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unsigned long flags); |
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extern void radix__huge_ptep_modify_prot_commit(struct vm_area_struct *vma, |
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unsigned long addr, pte_t *ptep, |
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pte_t old_pte, pte_t pte); |
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static inline int hstate_get_psize(struct hstate *hstate) |
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{ |
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unsigned long shift; |
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shift = huge_page_shift(hstate); |
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if (shift == mmu_psize_defs[MMU_PAGE_2M].shift) |
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return MMU_PAGE_2M; |
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else if (shift == mmu_psize_defs[MMU_PAGE_1G].shift) |
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return MMU_PAGE_1G; |
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else if (shift == mmu_psize_defs[MMU_PAGE_16M].shift) |
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return MMU_PAGE_16M; |
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else if (shift == mmu_psize_defs[MMU_PAGE_16G].shift) |
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return MMU_PAGE_16G; |
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else { |
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WARN(1, "Wrong huge page shift\n"); |
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return mmu_virtual_psize; |
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} |
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} |
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#define __HAVE_ARCH_GIGANTIC_PAGE_RUNTIME_SUPPORTED |
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static inline bool gigantic_page_runtime_supported(void) |
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{ |
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/* |
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* We used gigantic page reservation with hypervisor assist in some case. |
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* We cannot use runtime allocation of gigantic pages in those platforms |
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* This is hash translation mode LPARs. |
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*/ |
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if (firmware_has_feature(FW_FEATURE_LPAR) && !radix_enabled()) |
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return false; |
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return true; |
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} |
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/* hugepd entry valid bit */ |
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#define HUGEPD_VAL_BITS (0x8000000000000000UL) |
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#define huge_ptep_modify_prot_start huge_ptep_modify_prot_start |
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extern pte_t huge_ptep_modify_prot_start(struct vm_area_struct *vma, |
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unsigned long addr, pte_t *ptep); |
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#define huge_ptep_modify_prot_commit huge_ptep_modify_prot_commit |
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extern void huge_ptep_modify_prot_commit(struct vm_area_struct *vma, |
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unsigned long addr, pte_t *ptep, |
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pte_t old_pte, pte_t new_pte); |
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/* |
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* This should work for other subarchs too. But right now we use the |
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* new format only for 64bit book3s |
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*/ |
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static inline pte_t *hugepd_page(hugepd_t hpd) |
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{ |
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BUG_ON(!hugepd_ok(hpd)); |
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/* |
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* We have only four bits to encode, MMU page size |
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*/ |
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BUILD_BUG_ON((MMU_PAGE_COUNT - 1) > 0xf); |
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return __va(hpd_val(hpd) & HUGEPD_ADDR_MASK); |
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} |
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static inline unsigned int hugepd_mmu_psize(hugepd_t hpd) |
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{ |
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return (hpd_val(hpd) & HUGEPD_SHIFT_MASK) >> 2; |
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} |
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static inline unsigned int hugepd_shift(hugepd_t hpd) |
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{ |
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return mmu_psize_to_shift(hugepd_mmu_psize(hpd)); |
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} |
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static inline void flush_hugetlb_page(struct vm_area_struct *vma, |
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unsigned long vmaddr) |
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{ |
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if (radix_enabled()) |
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return radix__flush_hugetlb_page(vma, vmaddr); |
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} |
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static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr, |
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unsigned int pdshift) |
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{ |
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unsigned long idx = (addr & ((1UL << pdshift) - 1)) >> hugepd_shift(hpd); |
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return hugepd_page(hpd) + idx; |
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} |
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static inline void hugepd_populate(hugepd_t *hpdp, pte_t *new, unsigned int pshift) |
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{ |
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*hpdp = __hugepd(__pa(new) | HUGEPD_VAL_BITS | (shift_to_mmu_psize(pshift) << 2)); |
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} |
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void flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr); |
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static inline int check_and_get_huge_psize(int shift) |
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{ |
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int mmu_psize; |
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if (shift > SLICE_HIGH_SHIFT) |
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return -EINVAL; |
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mmu_psize = shift_to_mmu_psize(shift); |
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/* |
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* We need to make sure that for different page sizes reported by |
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* firmware we only add hugetlb support for page sizes that can be |
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* supported by linux page table layout. |
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* For now we have |
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* Radix: 2M and 1G |
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* Hash: 16M and 16G |
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*/ |
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if (radix_enabled()) { |
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if (mmu_psize != MMU_PAGE_2M && mmu_psize != MMU_PAGE_1G) |
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return -EINVAL; |
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} else { |
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if (mmu_psize != MMU_PAGE_16M && mmu_psize != MMU_PAGE_16G) |
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return -EINVAL; |
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} |
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return mmu_psize; |
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} |
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#endif
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